自定义对象的本地化存储

最新推荐文章于 2024-11-08 20:15:44 发布

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最新推荐文章于 2024-11-08 20:15:44 发布

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CC 4.0 BY-SA版权

文章标签： python

原文链接：https://my.oschina.net/u/2461772/blog/680648

本文介绍了如何使用NSCoding协议实现对象的归档与解档，包括编码与解码的具体实现，并展示了如何保存和读取归档数据。

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1、首先该对象需要遵守NSCoding协议 2、直接上代码

//归档
-(void)encodeWithCoder:(NSCoder *)aCoder{
    [aCoder encodeObject:self.type forKey:@"type"];
    [aCoder encodeObject:self.id forKey:@"id"];
    [aCoder encodeObject:self.createDate forKey:@"createDate"];
    [aCoder encodeObject:self.content forKey:@"content"];
    [aCoder encodeObject:self.modifyDate forKey:@"modifyDate"];
    [aCoder encodeObject:self.sendType forKey:@"sendType"];
    [aCoder encodeObject:self.title forKey:@"title"];
    [aCoder encodeObject:@(self.isNewMessage) forKey:@"isNewMessage"];
}
//解档
-(instancetype)initWithCoder:(NSCoder *)aDecoder{
    if (self = [super init]) {
        self.type = [aDecoder decodeObjectForKey:@"type"];
        self.id = [aDecoder decodeObjectForKey:@"id"];
        self.createDate = [aDecoder decodeObjectForKey:@"createDate"];
        self.content = [aDecoder decodeObjectForKey:@"content"];
        self.modifyDate = [aDecoder decodeObjectForKey:@"modifyDate"];
        self.sendType = [aDecoder decodeObjectForKey:@"sendType"];
        self.title = [aDecoder decodeObjectForKey:@"title"];
        self.isNewMessage = [[aDecoder decodeObjectForKey:@"isNewMessage"] boolValue];
    }
    return self;
}

3、保存

NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *filePath = [docPath stringByAppendingPathComponent:@"messages.data"];
    BOOL isTrueWrite = [NSKeyedArchiver archiveRootObject:messagesData toFile:filePath];

4、读取

NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
                for (MessageModel *model in arr) {
                    NSLog(@"%@",model.title);
                }

转载于:https://my.oschina.net/u/2461772/blog/680648